The CertCloseStore function closes a certificate store handle and reduces the reference count on the store. There needs to be a corresponding call to CertCloseStore for each successful call to the CertOpenStore or CertDuplicateStore functions.

The CertDuplicateStore function duplicates a store handle by incrementing the store's reference count.

static extern TODO CertDuplicateStore(TODO);

Declare Function CertDuplicateStore Lib "crypt32.dll" (TODO) As TODO

if(hDuplicateStore = CertDuplicateStore(hSystemStore))